2018 Honda CR-V (5th gen) · Known Issue
2018 Honda CR-V Oil Dilution (1.5T Engine): What It Really Costs to Fix
Quick answer: 2018 Honda CR-V oil dilution (1.5t engine) is free to fix on recall-covered VINs and up to $500 out of pocket otherwise.
Applies to: 1.5L turbo only. Other versions of the 2018 Honda CR-V do not have this problem.
What the Issue Is
The defining controversy of the fifth-generation CR-V: its 1.5-liter turbo direct-injection engine can let unburned gasoline slip past the piston rings and collect in the crankcase. In cold weather and short-trip driving, where the engine rarely gets hot enough to boil the fuel back out, the oil level rises above the full mark and the oil smells of gasoline. Honda's own bulletin describes the result: in some extreme cold-weather states, CR-Vs driven on very short trips can see the oil level rise, and in some cases a misfire.
Honda's remedy came in two steps. From late 2018, a product update for 2017 and 2018 CR-Vs sold in cold-weather states (first five states, then 21) updated the engine and transmission software so the engine warms up faster, and on some cars replaced the A/C control unit. In 2019, warranty extension 19-032 raised powertrain coverage on 2017 and 2018 CR-Vs with the 1.5T from 5 years/60,000 miles to 6 years from the original sale date with unlimited miles, in all 50 states. Six years from sale has now passed for essentially every one of those cars, so that coverage is over.
2019 CR-Vs got the revised software at the factory and are not in either campaign, so there is nothing to check by VIN on a 2019. On a used 2017 or 2018, the dipstick tells the story: an overfull dipstick smelling of fuel on a car "just serviced" means dilution is active, while a car with the update done, a normal oil level and a highway-commute history is largely past it.
Symptoms to Watch For
- 1.Oil level above the full mark on the dipstick
- 2.Strong gasoline smell on the dipstick or oil filler
- 3.Misfires, rough idle, or hesitation in cold weather
- 4.Check-engine light with misfire codes after short winter trips
- 5.Oil-life monitor counting down faster than expected
Real Repair Costs
The cold-weather product update was done free by Honda dealers, and the 19-032 powertrain extension has ended. What remains is management: more frequent oil changes on short-trip, cold-climate cars. The high figure is a year of extra oil services in a stubborn case.
| Repair | Typical Cost (installed) |
|---|---|
| Cold-weather software product update (2017-2018)done free by Honda dealers; a VIN check shows if it was applied | Free |
| Extra oil changes (severe short-trip use)per year, vs normal intervals | $150-$500 |
Moderate issue. Ranges are US independent-shop estimates with quality parts. Use them as negotiation grounding, not a quote.
Mechanic's Tip: Spot It Before You Buy
Pull the dipstick, cold, before startup, and do two things: check the level against the marks and smell it. Oil above full that smells like a gas station is active dilution; that is the entire test, free, in fifteen seconds. Then ask when the oil was last changed to calibrate what you saw, and on a 2017 or 2018 have a Honda dealer confirm by VIN that the cold-weather product update was applied. Prefer cars with commute-length driving history over urban short-trippers: dilution is a duty-cycle problem, and the previous owner's usage pattern is the biggest variable you can still choose.
The Bigger Ownership Picture
Beyond this specific issue, budget roughly $700-$1,100 per year for scheduled maintenance and repairs on a 2018 Honda CR-V. That is a typical US range from Avturo's ownership-cost table, an estimate rather than a quote, and it excludes insurance, fuel, and financing.
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Frequently Asked Questions
Is Honda 1.5T oil dilution still a problem?▼
On 2017 and 2018 CR-Vs it is a condition to manage rather than a mystery: Honda's remedy was a software update that warms the engine faster, plus regular oil changes, and short-trip winter driving remains the aggravating case. Checking the dipstick level and smell tells you where any specific car stands in about fifteen seconds.
Is the CR-V oil dilution warranty extension still active?▼
No. Warranty extension 19-032 raised powertrain coverage on 2017 and 2018 CR-Vs with the 1.5T to six years from the original sale date with unlimited miles, in all 50 states. Six years has passed for essentially every one of those cars, so engine repairs are now paid by the owner. The cold-weather software update is the part a dealer can still confirm by VIN.
What did Honda do about the problem?▼
Two things. From late 2018, a product update for 2017 and 2018 CR-Vs sold in 21 cold-weather states updated the engine and transmission software so the engine warms up faster, and on some cars replaced the A/C control unit. In 2019, warranty extension 19-032 raised powertrain coverage to six years with unlimited miles in all 50 states; that coverage has ended. 2019 models got the revised software at the factory.
How do I protect a 1.5T engine from dilution?▼
Drive it far enough to get fully warm regularly, change oil on the shorter end of the schedule (and any time the level reads above full), and on a 2017 or 2018 make sure the cold-weather software update was applied. Those habits target the exact conditions Honda's bulletin describes: cold weather and very short trips.
Sources
The facts on this page were last checked against these documents on October 10, 2026. Programs and their coverage end; check the car's VIN with a dealer for what still applies.
- Service bulletin: Honda product update bulletin on CR-V oil dilution in cold-weather states (NHTSA copy, 2018) (static.nhtsa.gov)
- Owner reports: Ward's: Honda 1.5L engine suffers cold-weather oil dilution problem (2018) (wardsauto.com)
- Warranty program: CarComplaints: Honda Civic and CR-V oil dilution warranties extended (2019) (carcomplaints.com)
- Warranty program: Ward's: Honda extends warranty to address 1.5L oil dilution problem (2019, all 50 states) (wardsauto.com)
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